%0 Journal Article %A Fournier, Gilles %A Fournier, Reine %T On the Homotopy Property of Nussbaum's Fixed Point Index %J Canadian journal of mathematics %D 1982 %P 44-62 %V 34 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1982-006-3/ %R 10.4153/CJM-1982-006-3 %F 10_4153_CJM_1982_006_3